Pleura Parietal

The parietal pleura is one of two layers of the pleura, which is the lining of the lungs and lines the inner surface of the chest. The parietal pleura covers the inner surface of the chest, except where the heart and lungs are located. It is closely connected to the outer layers of the chest, including the ribs, sternum and muscles.

The parietal pleura consists of a continuous layer of flat cells that cover the inner surface of the chest and diaphragm. It also covers the root of the lungs and continues into the pulmonary fissures. The parietal pleura and the visceral pleura, which cover the surface of the lungs, share a narrow space called the pleural cavity. This cavity is filled with fluid, which allows the lungs to move freely inside the chest without rubbing against the chest wall.

The pleural cavity also plays an important role in protecting the lungs. If there is trauma to the chest, such as from a blow or fall, the pleural space may fill with blood or air, causing the lung to collapse. This can be life-threatening and requires immediate medical attention.

In conclusion, the parietal pleura is an important component of the thorax and plays an important role in protecting the lungs. Its flat cells form a continuous layer that covers the inner surface of the chest and diaphragm. The pleural cavity, which it forms along with the visceral pleura, is filled with fluid, allowing the lungs to move freely within the chest without friction against the chest wall.